Journal
PLANT JOURNAL
Volume 97, Issue 6, Pages 1105-1119Publisher
WILEY
DOI: 10.1111/tpj.14186
Keywords
automatic phenotyping; functional mapping; genome-wide association studies; nitrogen deficiency; QTL; wheat
Categories
Funding
- Fundamental Research Funds for the Central Universities [2015ZCQ-SW-06, BLX2015-23]
- ARVALIS grant
- National Natural Science Foundation of China [31700576, 31600536]
- State Administration of Forestry of China [201404102]
- Agence Nationale de la Recherche [ANR-10-GENM-0008]
- Agence Nationale de la Recherche (ANR) [ANR-10-GENM-0008] Funding Source: Agence Nationale de la Recherche (ANR)
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As overfertilization leads to environmental concerns and the cost of N fertilizer increases, the issue of how to select crop cultivars that can produce high yields on N-deficient soils has become crucially important. However, little information is known about the genetic mechanisms by which crops respond to environmental changes induced by N signaling. Here, we dissected the genetic architecture of N-induced phenotypic plasticity in bread wheat (Triticum aestivum L.) by integrating functional mapping and semiautomatic high-throughput phenotyping data of yield-related canopy architecture. We identified a set of quantitative trait loci (QTLs) that determined the pattern and magnitude of how wheat cultivars responded to low N stress from normal N supply throughout the wheat life cycle. This analysis highlighted the phenological landscape of genetic effects exerted by individual QTLs, as well as their interactions with N-induced signals and with canopy measurement angles. This information may shed light on our mechanistic understanding of plant adaptation and provide valuable information for the breeding of N-deficiency tolerant wheat varieties.
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